Working with Hex-based maps

Let’s say I wanted to add hex-based functionality. Are there any files I would need from the map editor as a starting point?

I wouldn’t do it myself I don’t have the skills but I need this functionality for a project. I’m seriously considering paying someone to do this for me.

I think a lot of the code is done:

But I have no clue on where to begin to make this work with a Tiled map.

Any thoughts on how I should proceed?